Trolley-wheel.



H. PRACK. v

TROLLEY WHEEL.

LLLLLLLLLLLLLLLLLLLLLLLLL 1.

1,033,344. Patented July 23,1912.

WM. [CZQQM NOGRAPH Co.. wASHlNuToN,

UNTTED STATES PATENT omnes.

HENRY PRACK, or OTTAWA, ILLINOIS.

TROLLEY-WHEEL.

To @ZZ whom t may concern Be it known that I, HENRY Pinion, a citizen ofthe United States, and a resident of the city of Ottawa, county ofLasalle, and State of Illinois, have invented certain new and usefulimprovements in TrolleyWheels, of which the following is aspecification.

My invention relates to improvements in trolley wheels and has for itsobject the production of a device of this character which shall be ofimproved construction and efficient in operation.

A further object is the production of a trolley wheel which shall be soconstructed that eectual lubrication thereof may be readily afforded.

Other objects will appear hereinafter.

'With these objects in view my invention consists in a trolley wheelcharacterized as above mentioned and in certain details of constructionand arrangements of parts all as will be hereinafter described andclaimed.

My invention will be best understood by reference to the accompanyingdrawing forming a part of this specification, and in which,

Figure 1 is a central section of a trolley wheel embodying my invention,and Fig. 2 is a section taken on line of Fig. 1.

The preferred form of my construction as illustrated in the drawingcomprises a central stationary member which consists of two similarcircular members 1 which are rigidly secured together at intervals bymeans of screws or bolts 2 and nuts 3, the heads of the former and thelatter being preferably countersunl in the sides of said member 1 asclearly shown in Fig. 1. Formed centrally through the members 1 is anopening 4 which accommodates the pin or bolt 5 through the medium ofwhich the trolley wheel is secured in position upon the usual harp 6.

Formed in the periphery of the central member is a circumferentialgroove 7 at the base of which is arranged a plurality of spaced rollers8, the gudgeons 9 of said rollers being rotatably mounted in annularbearing members 10 arranged in the groove 7 at the opposite sidesthereof. Encircling the central member is the channel formed peripheralmember 11 which is designed for contact with the conductor wire as willbe readily understood. The base 12 of the member 11 is rotatably mountedin the groove 7 upon the rollers 8, inwardly eX- Specicaton of LettersPatent.

Application led. July 3, 1911.

Patented July 23, 1912.

Serial No. 636,607.

tending flanges 13 provided at the peripheries of the members 1 engagingover the respective edges of the base 12, the inner edge portions ofsaid iianges engaging annular grooves provided as shown in the sides ofthe member 11, serving to securely retain said member 11 in position.The construction is such as will be observed that the peripheral member11 is mounted for free rotarymovement in the member 1, the rollers 8alleviating friction and thereby conducing to the freedom of movement ofsaid peripheral member.

Formed concentrically in the central member intermediate the groove 7and the opening 4 is an annular chamber 14 adapted for the reception ofa lubricant, grease or other semi-fluid lubricant being preferablyemployed. In use, the chamber 14, as well as the interstices betweentherollers 8 are filled with the lubricant before the members 1 areassembled. Such provision evidently conduces to the free running of theperipheral member 11, said grease oozing through the joint between themembers 1 from the chamber 14 and from the interstices between therollers 8 effecting the eflicient lubrication of the contacting surfacesof said members 1 and 11. The construction is such that in the event ofthe member 11 becoming worn or otherwise disabled the same may bereadily and easily removed and a new one arranged in its place. Atrolley wheel of the construction set forth may be economicallymanufactured and the same is of high efficiency in operation.

Vhile I have illustrated and described the preferred form for carryingmy invention into effect, this is capable of variation and modificationwithout departing from the spirit of my invention. I, therefore, do notwish to be limited to the exact details of construction as set forth,but desire to avail myself of such variations and modifications as comeWithin the scope of the appended claims.

Having described my invention what I claim as new and desire to secureby Letters Patent is:

1. A trolley wheel comprising a circular central member having acircumferential groove in its periphery; bearing rollers mounted in saidgroove; and an annular channeled peripheral member formed for engagementwith the conductor wire, the base of said annular member being rotatablymounted in said groove with its inner surface bearing directly upon saidrollers, there being flanges provided at the sides of said grooveengaging over the respective edg'es of the base of said peripheralmember for retaining the latter in posit-ion, substantially asdescribed.

2. A trolley wheel comprising a circular central member having acircumferential groove in its periphery and an internal annularconcentric lubricant chamber; bearing rollers mounted in said groove;and an annular channeled peripheral member formed for engagement withthe conductor wire, the base of said peripheral member being rota tablymounted in said groove with its inner surface bearing directly upon saidrollers, substantially as described.

A trolley wheel comprising a circular central member consisting of twosimilar parts rigidly secured together, there being a circular grooveformed at the periphery of said central member and an internalconcentric annulailubricant chamber formed between said parts; bearingrollers mounted between said parts and in said groove; and an annularchanneled peripheral member formed for engagement with the conductorwire ii'otatably mounted in said groove and having a cylindrical innersurface bearing directly upon said rollers, there being inwardlyextending flanges at the sides or' said groove engaging over the base ofsaid peripheral member for retaining the latter in position,substantially as described.

4. A trolley wheel comprising a circular central member consisting oftwo similar parts rigidly secured together, there being a circulargroove formed at the periphery of said cent-ral member and an internalconcentric annular lubricant chamber formed between said parts, egressfrom said lubricant chamber outwardly being permitted through the jointbetween said parts of said central member; bea-ring rollers mounted between said parts and in said groove; and an annular channeled peripheralmember formed for engagement with the conductor wire rotatably mountedin said groove and having a cylindrical inner surface bearing directlyupon said rollers, there being inwardly extending annular flanges at thesides of said groove engaging over the base of said peripheral member,and the inner edge portions of said flanges engaging annular grooves inthe sides of said peripheral member, substantially as described.

ln testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

- HENRY PRACK.

Vitnesses ARTHUR A. OLSON, JOSHUA R. H. PoTTs.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. C.

